Definition

Hand numbness is an abnormal sensation caused by an alteration in sensory nerve function.

Alternative Names

Numb hands, numbness in hands, hand paresthesias.

Synopsis

Sensations are carried from the extremities of the body to the brain via neurons in the spinal cord. If the blood supply to the nerves is decreased, it can produce the feeling that "my hand fell asleep". If the blood loss is permanent or severe, it is called ischemia and can result in permanent nerve damage. Nerves in the hands can be compressed by swelling due to repetitive motions or prolonged vibrations. If the compression is chronic, the result can be an entrapment syndrome, like carpal tunnel syndrome.

Associated Diagnoses

Carpal tunnel syndrome

Entrapment syndromes

Repetitive motion injuries

Trauma

Systemic lupus erythematosus

Frostbite

Beriberi

Diabetic nerve damage

Multiple sclerosis

Snake bites

Neuralgias

Rabies

Radiculopathy

Peripheral neuropathy

Pernicious anemia

Toxin exposure or poisoning

Stroke

Lyme disease

Alcoholism

Malnutrition

Diagnosis and Treatments

If hand numbness is persistent and accompanied by other symptoms such as weakness and pain, it requires thorough evaluation by a physician. A complete history and physical, including family history, work history, laboratory tests may be indicated. Nerve conduction velocity tests, electromyography, imaging studies and nerve biopsy may be required. Treatment will depend on the underlying cause and relieving symptoms. Physical and occupational therapy as well as stretching exercises may help alleviate symptoms once the underlying cause is found and treated.